TWI406166B - Touch panel and detecting method for multiple-touching of the same, and touch display apparatus - Google Patents

Abstract

A touch panel including a substrate, a sensing array and a signal detecting layer is provided. The sensing array disposed over the substrate comprises a plurality of sensing pads arranged in array, wherein the sensing pads includes a plurality of first sensing pads arranged along a first direction and a plurality of second sensing pads arranged along a second direction, and the first direction intersects the second direction. The signal detecting layer is interlaid between the sensing array and the substrate, wherein the signal detecting layer includes a plurality of individual signal detecting units. Each of the signal detecting units is corresponding to more than one sensing pads for detecting a variation of electric field due to a touching event. By which, erroneous sensing of the touch panel can be prevented. Furthermore, a detecting method for multiple-touching applied to the touch panel and a touch display apparatus are provided.

Description

Touch panel and multi-touch detection method thereof and touch display device

The present invention relates to a touch device and a method for detecting the same, and more particularly to a touch panel and a multi-touch detection method thereof.

In recent years, with the rapid development and application of information technology, wireless mobile communication and information appliances, many information products have been input devices such as traditional keyboards or mice for the purpose of being more convenient, lighter and more humanized. , changed to use a touch panel (Touch Panel) as an input device.

1 shows a conventional touch panel. For the sake of clarity, FIG. 1 only shows the structure of the sensing series of the touch panel, and other possible film layers or components are omitted. As shown in FIG. 1 , the conventional touch panel 100 includes a plurality of first sensing series 120 and a plurality of second sensing series 140 . In more detail, the first sensing series 120 extends in the Y direction, wherein each of the first sensing series 120 is formed by a plurality of first sensing pads 122 connected in series with the first connecting line 124. The second sensing series 140 extends in the X direction, wherein each of the second sensing series 140 is formed by a plurality of second sensing pads 142 and a second connecting line 144. The first sensing pad 122 and the second sensing pad 142 may form a sensing array to achieve surface sensing.

When the user touches the touch panel 100 with a finger, the first sensing series 120 and the second sensing series 140 of the touch panel 100 generate a change in capacitance at a position where the finger contacts. The change in this capacitor will be converted to one The control signal is transmitted to the control circuit board, and after the result of the operation processing, an appropriate command is output to operate the electronic device.

As shown in FIG. 1, the figure shows a schematic diagram of the peak position when the user touches the position A and the position B. Referring to FIG. 1 , taking the X and Y axes as an example, when the touch panel detects the touch position, the first sensing series 120 and the second sensing series 140 corresponding to the X axis and the Y axis are respectively scanned. Since the sensor corresponding to the first sensing series 120 and the second sensing series 140 on the touch panel respectively has a capacitive coupling phenomenon due to the touch, the peak position corresponding to the different axial directions will be corresponding. After the rendezvous, you can locate the touch position.

As shown in Fig. 1, when the user touches the position A and the position B, the touched position A and the touched position B generate two peak positions on the X-axis and the Y-axis (for example, X1 and X2). , Y1 and Y2), the intersection of the two axial peak positions will produce 4 intersection points (for example: A, B, A' and B'), where the two intersections are not true touch locations (for example :A' and B') are called Ghost points. In this case, the touch panel detects a non-true touch position, which causes an operation error.

The invention provides a touch panel, which assists in determining the touch signal on the sensing array by a signal detecting layer to improve the positioning accuracy of the touch panel.

The invention provides a multi-touch detection method for a touch panel, which can eliminate an error sensing point when a multi-finger touch is encountered.

The present invention provides a touch display device for assisting in determining the touch signal on the sensing array by a signal detecting layer to improve the positioning accuracy of the touch panel in the touch display device.

The invention provides a touch panel comprising a substrate, a sensing array layer and a signal detecting layer. The sensing array layer is disposed on the substrate, and the sensing array layer has a plurality of sensing pads arranged in an array, the sensing pad includes a plurality of first sensing pads extending along the first direction and a plurality of second sensing pads a second sensing pad extending in a direction, wherein the first direction intersects the second direction. The signal detecting layer is located between the sensing array layer and the substrate, and the signal detecting layer has a plurality of independent signal detecting blocks, each of the signal detecting blocks corresponding to the plurality of sensing pads, and detecting the touch And the resulting electric field changes.

In one embodiment of the present invention, the touch panel further includes a plurality of signal detecting lines, wherein each of the signal detecting lines is electrically connected to each of the signal detecting blocks.

In an embodiment of the invention, the sensing array layer further includes a plurality of first bridge lines and a plurality of second bridge lines, wherein each of the first bridge lines is connected in series with two adjacent first sensing pads. To form a first sensing series, and a plurality of second bridge wires, each of the second bridge wires is connected in series with two adjacent second sensing pads to form a second sensing series.

In an embodiment of the invention, the first sensing pad, the second sensing pad and the second bridge wire are formed by a single transparent conductive layer, and the second bridge wire is formed by another conductive layer.

In an embodiment of the invention, the first sensing pad, the second sensing pad and the first bridge wire are formed by the same conductive layer, and the second bridge wire is formed by another conductive layer.

In an embodiment of the invention, each of the signal detecting blocks is substantially block-shaped, and an edge of each of the signal detecting blocks is substantially aligned with an edge of the corresponding sensing pad.

In an embodiment of the present invention, each of the signal detecting blocks is substantially strip-shaped, and the signal detecting blocks are parallel to each other and extend along a third direction, wherein the third direction is different from the first direction and the third direction The two directions, and the edge of each signal detection block is substantially aligned with the edge of the corresponding sensing pad.

In an embodiment of the present invention, each of the signal detecting blocks includes a plurality of signal detecting pads, each of the signal detecting pads corresponding to one of the sensing pads, each of the signal detecting pads having an opening The size of the opening is substantially equal to the size of each of the sensing pads, and the signal detecting pad substantially overlaps the gap between the sensing pads.

In an embodiment of the present invention, each of the signal detecting blocks includes a plurality of signal detecting pads, and each of the signal detecting pads corresponds to one of the sensing pads, and each of the signal detecting pads is a full surface. And the size of each signal detecting pad is substantially equal to the size of each sensing pad.

In an embodiment of the invention, the touch panel further includes a controller electrically connected to the signal detecting line, and the signal detecting block outputs the detected electric field change caused by the touch to the controller. In order to judge the presence or absence of a touch event.

In an embodiment of the invention, the touch panel further includes a dielectric layer between the sensing array layer and the signal detecting layer.

In an embodiment of the invention, the touch panel further includes a display panel, and the substrate is located on the display panel, so that the signal detection layer is located Between the display panel and the sensing array layer.

The present invention further provides a multi-touch detection method for a touch panel, which is suitable for detecting the above touch panel. The multi-touch detection method of the touch panel includes the following steps. The touch position is determined according to the change in the capacitance value of the sensing pad on the sensing array layer. The signal detection block of the signal detection layer determines the presence or absence of a touch event according to the corresponding electric field change caused by the touch. The sensing position of the sensing array layer is compared with the judgment of the signal detecting layer.

In an embodiment of the invention, the multi-touch detection method of the touch panel further includes masking the error sensing position according to the comparison result.

In an embodiment of the invention, the multi-touch detection method of the touch panel further includes removing the real sensing position according to the comparison result.

The present invention further provides a touch display device, which includes a touch panel and a display panel. The touch panel includes a substrate, a sensing array layer and a signal detecting layer. The sensing array layer is disposed on the substrate, and the sensing array layer has a plurality of sensing pads arranged in an array, the sensing pad includes a plurality of first sensing pads extending along the first direction and a plurality of extending along the second direction a second sensing pad, wherein the first direction intersects the second direction. The signal detecting layer is located between the sensing array layer and the substrate, and the signal detecting layer has a plurality of independent signal detecting blocks, each of the signal detecting blocks corresponding to the plurality of sensing pads, and detecting the touch And the resulting electric field changes. The display panel is disposed relative to the touch panel, wherein the signal detection layer is located between the display panel and the sensing array layer.

Based on the above, the touch panel of the present invention and the multi-touch detection method thereof and the touch display device further detect the electric field change caused by the touch by using the signal detection layer having the signal detection block. Determine the true touch Control position. Thereby, the error sensing point generated when the touch panel is multi-finger touch can be eliminated, so as to correctly calculate the true touch position and improve the positioning accuracy.

The above described features and advantages of the present invention will be more apparent from the following description.

The invention provides a touch panel and a multi-touch detection method thereof, which are mainly configured to configure a signal detection layer on the sensing array layer of the touch panel, and divide the signal detection layer into multiple signal detection layers. The measurement block uses each signal detection block to detect the electric field change caused by the touch, and detects the signal detected by the signal detection layer and the touch point sensed on the sensing array layer. Judging the position of the real touch point, the accuracy of the touch panel can be greatly improved, and the problem of the error sensing point can be avoided. Hereinafter, a touch panel and a multi-touch detection method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

2A and 2B are respectively a perspective view and a cross-sectional view of a touch panel according to an embodiment of the invention. Referring to FIG. 2A and FIG. 2B , the touch panel 200 includes a substrate 210 , a sensing array layer 220 , and a signal detecting layer 230 . The sensing array layer 220 is disposed on the substrate 210, and the sensing array layer 220 has a plurality of sensing pads 222 arranged in an array to achieve surface sensing. The sensing pad 222 includes a plurality of first sensing pads 222A extending along the first direction D1 and a plurality of second sensing pads 222B extending along the second direction D2, wherein the first direction D1 intersects the second direction D2 In this embodiment, the first direction D1 is, for example, a row direction, and the second direction D2 is, for example, a column direction, and the first direction D1 and the second direction D2 are orthogonal in this embodiment. Of course, the angle between the first direction D1 and the second direction D2 may not be 90 degrees. And set. In particular, a signal detecting layer 230 is added between the sensing array layer 220 and the substrate 210. The signal detecting layer 230 has a plurality of independent signal detecting blocks 232, and each signal detecting block 232 corresponds to A plurality of sensing pads 222 in the array layer 220 are sensed and sensed by a change in electric field due to a touch. The related components of the touch panel 200 will be described below.

Specifically, the sensing array layer 220 further includes a plurality of first bridge wires 224A, each of the first bridge wires 224A is connected in series with two adjacent first sensing pads 222A to form a first extending along the row direction. Sensing string 226A. On the other hand, the sensing array layer 220 further includes a plurality of second bridge lines 224B, and each of the second bridge lines 224B is connected in series with two adjacent second sensing pads 222B to form a second sense extending along the columns. SERIES 226B. Moreover, as shown in the enlarged view of FIG. 2A, the first bridge line 224A and the second bridge line 224B are interlaced with each other, and in this embodiment, the first sensing pad 222A, the second sensing pad 222B, and the second bridge line 224B is composed of a single layer of transparent conductive layer, while the first bridge wire 224A utilizes another conductive layer to span the second bridge wire 224B, and an insulation is provided between the first bridge wire 224A and the second bridge wire 224B. A layer (not shown), so that the first sensing series 226A and the second sensing series 226B are electrically insulated from each other even if the first bridge line 224A and the second bridge line 224B are interdigitated. Of course, those skilled in the art can also slightly change the constituent layers of the first sensing pad 222A, the second sensing pad 222B, the first bridge wire 224A, and the second bridge wire 224B. For example, the first sensing pad 222A, the second sensing pad 222B, and the first bridge wire 224A may also be composed of a single transparent conductive layer, and the second bridge 224B utilizes another conductive layer to cross the first The bridge wire 224A, or two different conductive layers of the first sensing pad 222A and the second sensing pad 222B respectively form the first bridge wire 224A and the second bridge wire 224B, it is worth mentioning that, A sensing pad 222A and a second sensing pad 222B can be the same as one conductive material or different conductive materials. The present invention does not limit the relative positions and configurations of the first sensing pad 222A, the second sensing pad 222B, the first bridge wire 224A, and the second bridge wire 224B. In this way, the first sensing pad 222A and the second sensing pad 222B can form a sensing array on one side, and the first sensing pad 222A and the second sensing pad 222B are coplanar, thus forming a sensing array layer. 220, by which the capacitance change generated by the user's touch position is transmitted to the controller.

2A and 2B, the touch panel 200 further includes a plurality of signal detecting lines 240 and a controller 250. Each of the signal detecting lines 240 is electrically connected to each of the signal detecting blocks 232, and is controlled. The device 250 is electrically connected to the signal detecting line 240. It is to be noted that, for the sake of clarity, only the relative electrical connection relationship between each signal detecting line 240 and each signal detecting block 232 is schematically indicated in the figure, and the signal detecting line 240 is actually pulled. The line position can be hidden in each signal detection block 232 or in a suitable position according to requirements, and the signal detection line 240 must not be the same as the layout type shown in FIG. 2A. In addition, in this embodiment, a dielectric layer 280 may be disposed between the sensing array layer 220 and the signal detecting layer 230 to electrically insulate the sensing array layer 220 from the signal detecting layer 230 from each other. . In actual In the operation mechanism, when the user touches the sensing array layer 220 and causes the sensing pad 222 of the touch to generate a capacitance change amount, the signal detecting block 232 corresponding to the real touch in the signal detecting layer 230 can sense The electric field changes caused by the touch. Then, the sensing array layer 220 and the signal detecting layer 230 respectively transmit the signal and the sensing signal of the electric field change to the controller 250, and the controller 250 detects the electric field change signal and the sensing signal outputted by the signal detecting layer 230. After the sensing signal output by the array layer 220, it is determined whether the touch event is present or not.

For example, FIG. 2C is a top view of FIG. 2A of the present invention, wherein for clarity of description, the signal detection block division pattern is indicated in FIG. 2C. Referring to FIG. 2C, when the user touches the position A and the position B at the same time, the signal detecting block 232 corresponding to the real touch in the signal detecting layer 230 can sense the electric field generated at the touch position A and the position B. The change, therefore, even if the touch position sensed by the sensing array layer 220 may have the position A, the position B, and the position A' and the position B', the electric field change signal detected by the signal detecting layer 230 (such as signal detection) The measurement block 232a and the signal detection block 232b) can serve as a double check of the sensing signal of the sensing array layer 220, so that since the position A' and the position B' are not touched, Therefore, the signal detecting layer 230 under the position A' and the position B' does not sense the electric field change. In other words, the signal detected by the signal detecting layer 230 can help determine the position of the real touch point, thereby solving the Ghost point generated by the conventional touch panel 200 during multi-touch. problem.

Of course, in the actual application level, the touch panel can usually be matched with one. The display panel constitutes a touch display device. 2D is a cross-sectional view of a touch display device according to an embodiment of the invention. Referring to FIG. 2D , the substrate 210 of the touch panel 200 is disposed on the display panel 260 to form a touch display device 300 . The signal detecting layer 230 is located between the display panel 260 and the sensing array layer 220 . The display panel 260 can be further electrically connected to the touch panel 200. In other words, in the touch display device 300 of the embodiment, the display panel 260 can be based on the touch points in the touch panel 200. The touch panel 200 in the touch display device 300 of the present embodiment can be solved when the touch panel 200 of the present embodiment is configured to be combined with the display panel 260 to form the touch display device 300. Conventionally, the touch panel 100 generates a problem of a Ghost point when multi-touching, so that the display panel 260 can correctly display a screen that the user desires to operate, thereby avoiding a situation in which a malfunction occurs.

To clearly illustrate the touch panel of the present invention, the configuration of the signal detecting layer 230 will be described in detail below by taking the touch panel 200 illustrated in FIG. 2A as an example.

3 is a top view of the signal detecting layer in the touch panel of FIG. 2A. Referring to FIG. 2A and FIG. 3 , in this embodiment, each of the signal detecting blocks 232 is substantially block-shaped, and the edge of each of the signal detecting blocks 232 is substantially aligned with the edge of the corresponding sensing pad 222 . In detail, please refer to FIG. 2A and FIG. 3 simultaneously. In this embodiment, the sensing array layer 220 is divided into a plurality of sensing pad groups 222G, and each sensing pad group 222G is gathered by A sensing pad 222 is formed together, corresponding to each sensing pad group 222G The square signal detection layer 230 is planned as a signal detection block 232. Each of the signal detection blocks 232 includes a plurality of signal detection pads 270, and each of the signal detection pads 270 substantially corresponds to one of the sensing pads 222. For example, the range of the signal detecting block 232a illustrated in FIG. 2A and FIG. 3 corresponds to the range in the sensing pad group 222Ga, and the signal detecting block 232a is substantially block-shaped, and the signal detecting The edge of the test block 232a is substantially the same shape as the outermost sense pad 222 of the sense pad group 222Ga.

Further, please continue to refer to FIG. 2A and FIG. 3 . In this embodiment, each of the signal detecting pads 270 has an opening H having a size substantially equal to the size of each sensing pad 222 and a signal. The detection pad 270 substantially overlaps the gap between the sensing pads 222. As shown in FIG. 2A and FIG. 3, the diagonal length of the opening H of each of the signal detecting pads 270 is, for example, D, and the diagonal length of each of the sensing pads 222 is, for example, d, in this embodiment. D is substantially equal to d. In other words, the size of each of the signal detecting pads 270 is substantially larger than each of the sensing pads 222 such that the opening H of the signal detecting pad 270 just exposes its corresponding sensing pad 222, in other words, the sensing pad 222. It is correspondingly disposed directly above the opening H such that on the projection of the substrate 210, the sensing pad 222 coincides with the area of the opening H. In this way, the shape of the signal detecting pad 270 is corresponding to the position between the adjacent sensing pads 222 in the projection direction of the substrate 210, thereby compensating for the light penetrating sensing array layer 220 and the signal detecting layer. The problem of chromatic aberration at 230 o'clock helps the capacitive touch panel 200 shown in FIG. 2A to provide a better visual effect. In addition, since the signal detecting pad 270 has a partially hollowed out area on the projection of the substrate 210, the touch panel 200 can be further improved. The overall transparency.

In addition, the operation mode of FIG. 3 is as described above and will not be described again.

In addition, several variations of the signal detection layer of the present invention will be described below.

4 is a top plan view of a signal detection layer in accordance with an embodiment of the present invention. Referring to FIG. 4, the signal detecting layer 330 of the present embodiment is similar to the signal detecting layer 230 shown in FIG. 3, and its shape is also substantially block-shaped. However, in this embodiment, each of the signal detecting pads 270 is a full-face type without a cutout area, and in this embodiment, each of the signal detecting pads 270 has a size substantially equal to that of each of the sensing pads 222. size. When the signal detecting layer 330 of the embodiment is combined with the other display panel 260 to form the touch display device 300 of the stacked structure of FIG. 2D, the full-surface signal detecting pad 270 forms a full-surface signal detecting device. The layer 330 can serve as a signal shielding layer to help shield the interference from the signal on the display panel 260 (shown in FIG. 2D ) to the touch panel 200 , thereby increasing the sensitivity of the touch panel 200 .

It is worth mentioning that the designer can design the number and shape of the signal detecting block 232 on the signal detecting layer 330 according to the space of the substrate, the number of control pins of the controller, the fineness of the judgment, and the product specifications. . The present invention is not limited to the shape and number of the signal detecting block 232 on the signal detecting layer 330. Of course, those skilled in the art can adjust the present invention without departing from the spirit of the present invention. Related component shapes are designed and configured to meet actual conditions and needs.

The design patterns of several signal detection layers in one embodiment of the present invention are described below.

FIG. 5 is a top view of a signal detection layer according to an embodiment of the present invention. Referring to FIG. 5, in the signal detecting layer 430 of the embodiment, each of the signal detecting blocks 232 is substantially strip-shaped. In detail, the signal detection blocks 232 are parallel to each other and extend along the third direction D3, wherein the third direction D3 is different from the first direction D1 and the second direction D2. In this embodiment, the third direction D3 is, for example, Arranged along the direction of the first quadrant and the third quadrant. The edge of each of the signal detection blocks 232 is substantially aligned with the edge of the sensing pad 222 depicted on the sensing array layer 220 of FIG. 2A. Referring to FIG. 2 and FIG. 5 , in other words, in the embodiment, the sensing array layer 220 is divided into a plurality of sensing pad groups 222G extending along the third direction D3 according to the strip signal detecting block 232 . In this embodiment, the sensing pad group 222G has a strip shape.

In more detail, as described above, please refer to FIG. 2 and FIG. 5 simultaneously. In this embodiment, each of the signal detecting pads 270 has an opening H, and the size D of the opening H is substantially equal to that of each of the sensing pads 222. Dimension d, and the signal detection pad 270 substantially overlaps the gap between the sensing pads 222. In other words, the size of each of the signal detecting pads 270 is substantially larger than each of the sensing pads 222 such that the opening H of the signal detecting pad 270 just exposes its corresponding sensing pad 222, in other words, the sensing pad 222. It is correspondingly disposed directly above the opening H such that on the projection of the substrate 210, the sensing pad 222 coincides with the area of the opening H. In this way, the signal detecting pad 270 is correspondingly located at the gap between the adjacent sensing pads 222 on the projection of the substrate 210, thereby compensating for the light to be transmitted through the sensing array layer 220 and the signal detecting layer 430. The problem of chromatic aberration helps the capacitive touch panel 200 to provide better Visual effect. In addition, since the signal detecting pad 270 has a partially hollowed out area on the projection of the substrate, the overall transmittance of the touch panel 200 can be further improved.

FIG. 6 is a top view of a signal detecting layer according to an embodiment of the present invention. Referring to FIG. 6, the signal detecting layer 530 of this embodiment is similar to the signal detecting layer 430 shown in FIG. 5, and its shape is also substantially strip-shaped. However, in this embodiment, each of the signal detecting pads 270 is a full-face type without a cutout area, and in this embodiment, each of the signal detecting pads 270 has a size substantially equal to that of each of the sensing pads 222. size. Referring to FIG. 6 and FIG. 2A, when the signal detecting layer 530 of the embodiment is matched with other display panels 260 (shown in FIG. 2D), the full-surface signal detecting pad 270 can serve as a signal shielding layer, which is helpful. The interference from the signal on the display panel 260 to the touch panel 200 is shielded, so the sensitivity of the touch panel 200 can be increased.

For example, the touch panel 200 shown in FIG. 2A is taken as an example. A multi-touch detection method of the touch panel 200 is further provided. Please refer to FIG. 2A and FIG. 7 simultaneously, which will be described below.

FIG. 7 is a schematic flow chart of a multi-touch detection method for several touch panels of the present invention. Referring to FIG. 7, step S1 is to locate the touch position by the sensing array layer, and step S2 is to determine the presence or absence of the touch event by the signal detecting block of the signal detecting layer, and steps S1 and S2 are independent events. In the execution, the step S1 may be performed after the step S1 is performed, or the step S1 may be performed after the step S2 is performed first, or the step S1 and the step S2 may be performed simultaneously. Specifically, after the start of the process S0, step S1 is performed first, according to the change of the capacitance value of the sensing pad 222 on the sensing array layer 220. Bit touch position. Then, in step S2, the signal detecting block 232 of the signal detecting layer 230 determines the presence or absence of the touch event according to the electric field change caused by the touch. Then, step S3 is performed to compare the touch position of the sensing array layer 220 with the judgment of the signal detecting layer 230. More specifically, the multi-touch detection method of the touch panel 200 may further include performing step S4A to mask the error sensing position according to the comparison result. Alternatively, the multi-touch detection method of the touch panel 200 may further include performing step S4B to extract the real sensing position according to the comparison result. It is worth mentioning that the order of execution of the above steps S1 and S2 can also be reversed.

Of course, the multi-touch detection method of the touch panel 200 can also be as shown in the flowchart of the left side of FIG. 7. The steps S1 and S2 are also performed synchronously. In other words, the signals of the sensing array layer and the signal detecting layer can also be synchronously output to the controller 250. The order of execution of step S1 and step S2 is not limited.

In summary, the touch panel of the present invention and the multi-touch detection method thereof and the touch display device further sense the electric field change caused by the touch by the signal detecting layer having the signal detecting block. To determine the true touch position. Thereby, the error sensing point generated when the touch panel is multi-finger touch can be eliminated, so as to correctly calculate the true touch position and improve the positioning accuracy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100,200‧‧‧ touch panel

120, 226A‧‧‧ first sensing series

124, 224A‧‧‧ first bridge wiring

140, 226B‧‧‧Second sensing series

142, 222B‧‧‧ second sensing pad

144, 224B‧‧‧Second bridge wiring

210‧‧‧Substrate

220‧‧‧Sensor array layer

222‧‧‧Sense pad

222A‧‧‧First sensing pad

222B‧‧‧Second sensing pad

222G, 222Ga‧‧‧ Sense Pad Group

230, 330, 430, 530‧‧‧ signal detection layer

232, 232a, 232b‧‧‧ signal detection block

240‧‧‧Signal detection line

250‧‧‧ Controller

260‧‧‧ display panel

270‧‧‧Signal Detection Pad

300‧‧‧Touch display device

D1‧‧‧ first direction

D2‧‧‧ second direction

D3‧‧‧ third direction

H‧‧‧ openings

S1, S2, S3, S4A, S4B‧‧‧ steps

FIG. 1 illustrates a conventional touch panel.

2A and 2B are respectively a perspective view and a cross-sectional view of a touch panel according to an embodiment of the invention.

2C is a top view of the touch panel of FIG. 2A.

2D is a cross-sectional view of a touch display device according to an embodiment of the invention.

3 is a top view of the signal detecting layer in the touch panel of FIG. 2A.

4 is a top plan view of a signal detection layer in accordance with an embodiment of the present invention.

FIG. 5 is a top view of a signal detection layer according to an embodiment of the present invention.

FIG. 6 is a top view of a signal detecting layer according to an embodiment of the present invention.

FIG. 7 is a schematic flow chart of a multi-touch detection method for a touch panel according to the present invention.

200‧‧‧ touch panel

210‧‧‧Substrate

220‧‧‧Sensor array layer

222‧‧‧Sense pad

222A‧‧‧First sensing pad

222B‧‧‧Second sensing pad

224A‧‧‧First Bridge Wiring

224B‧‧‧Second bridge wiring

226A‧‧‧First sensing series

226B‧‧‧Second sensing series

222G, 222Ga‧‧‧ Sense Pad Group

230‧‧‧Signal Detection Layer

232, 232a‧‧‧ signal detection block

240‧‧‧Signal detection line

250‧‧‧ Controller

270‧‧‧Signal Detection Pad

D1‧‧‧ first direction

D2‧‧‧ second direction

H‧‧‧ openings

Claims (16)

A touch panel includes: a substrate; a sensing array layer disposed on the substrate, the sensing array layer having a plurality of sensing pads arranged in an array, the sensing pads comprising: electrically connected to each other The first sensing pads are arranged along the first direction; the plurality of second sensing pads electrically connected to each other are arranged along the second direction, wherein the first direction intersects the second direction, and the The two sensing pads are electrically insulated from the first sensing pads: and a signal detecting layer is located between the sensing array layer and the substrate, and the signal detecting layer has multiple independent signal detection layers. In the block, each signal detecting block corresponds to a plurality of sensing pads, and detects an electric field change caused by the touch. The touch panel of claim 1 further includes a plurality of signal detection lines, wherein each of the signal detection lines is electrically connected to each of the signal detection blocks. The touch panel of claim 1, wherein the sensing array layer further comprises: a plurality of first bridge wires, each of the first bridge wires is connected in series with two adjacent first sensing pads to form a first sensing series; and a plurality of second bridge wires, each of the second bridge wires being connected in series with two adjacent second sensing pads to form a second sensing series. The touch panel of claim 3, wherein the touch panels The first sensing pads, the second sensing pads and the second bridge wires are formed of the same conductive layer, and the first bridge wires are formed by another conductive layer. The touch panel of claim 3, wherein the first sensing pads, the second sensing pads and the first bridge wires are formed of the same conductive layer, and the second bridges are The line is made up of another conductive layer. The touch panel of claim 1, wherein each of the signal detecting blocks is substantially block-shaped, and an edge of each of the signal detecting blocks and an edge of the corresponding sensing pads are substantially Aligned up. The touch panel of claim 1, wherein each of the signal detecting blocks is substantially strip-shaped, and the signal detecting blocks are parallel to each other and extend along a third direction, wherein the third direction Different from the first direction and the second direction, and the edges of each of the signal detecting blocks are substantially aligned with the edges of the corresponding sensing pads. The touch panel of claim 1, wherein each of the signal detecting blocks comprises a plurality of signal detecting pads, and each of the signal detecting pads corresponds to one of the sensing pads. The signal detecting pad has an opening, the size of the opening is substantially equal to the size of each sensing pad, and the signal detecting pads substantially overlap the gap between the sensing pads. The touch panel of claim 1, wherein each of the signal detecting blocks comprises a plurality of signal detecting pads, and each of the signal detecting pads corresponds to one of the sensing pads. The signal detecting pads are of a full face type, and the size of each signal detecting pad is substantially equal to the size of each sensing pad. The touch panel of claim 1, further comprising a controller electrically connected to the signal detecting lines, the signal detecting blocks The electric field change caused by the detected touch is output to the controller to determine the presence or absence of the touch event. The touch panel of claim 1, further comprising a dielectric layer between the sensing array layer and the signal detecting layer. The touch panel of claim 1, further comprising a display panel, the substrate being located on the display panel such that the signal detecting layer is located between the display panel and the sensing array layer. A multi-touch detection method for a touch panel, which is suitable for detecting a touch panel according to claim 1, comprising: sensing capacitance values of the sensing pads on the array layer according to the sensing Changing to locate the touch position; the signal detection blocks of the signal detection layer are based on the electric field change caused by the touch to determine the presence or absence of the touch event; and the positioning of the sensing array layer The touch position and the judgment of the signal detection layer. The multi-touch detection method of the touch panel of claim 13 further includes masking the error sensing position according to the comparison result. The multi-touch detection method of the touch panel according to claim 13 of the patent application, further comprising: taking the real sensing position according to the comparison result. A touch display device includes: a touch panel comprising: a substrate; a sensing array layer disposed on the substrate, the sensing array layer having a plurality of sensing pads arranged in an array, the sensing pads include: a plurality of first sensing pads electrically connected to each other extending along the first direction; a plurality of second sensing pads electrically connected to each other extending along the second direction, wherein the first direction and the second direction Intersected, and the second sensing pads are electrically insulated from the first sensing pads; and a signal detecting layer is located between the sensing array layer and the substrate, and the signal detecting layer has multiple Independent signal detecting blocks, each signal detecting block corresponding to a plurality of sensing pads, and detecting an electric field change caused by the touch; and a display panel disposed relative to the touch panel, wherein The signal detecting layer is located between the display panel and the sensing array layer.